--- docs/reference/Makefile.am.orig
+++ docs/reference/Makefile.am
@@ -80,7 +80,6 @@ GTKDOC_LIBS=	\
 	$(PLUMA_LIBS)

-# This includes the standard gtk-doc make rules, copied by gtkdocize.
-include $(top_srcdir)/gtk-doc.make
+# gtk-doc disabled

 # Other files to distribute